论文部分内容阅读
花岗岩岩浆可以认为是可能的矿质来源之一.因为绝大多数各种成因类型的稀有元素矿床在空间上都与花岗岩类有关.但是,尽管在岩石或构造方面具备稀有金属矿化富集的有利条件,也不是所有的花岗岩类部伴随产生矿床或矿点.看来,这与花岗岩岩浆的产生及其随后结晶的不同条件有关.这些条件决定着分散于其中的稀有元素形成岩浆期后富集的可能性.如果说用来判断对花岗岩类含矿性有影响的区域性特点或年龄特征方面的资料还不足的话,那么大量的地质、岩石方面的考察都导致一种看法:这种看法认为,就含矿性的意义来说,最有前景的往往是多期侵入体晚期的淡色花岗岩类,以及规模不大荷成份复杂的花岗岩类岩体.这种岩体均赋存于区域性断裂带,一般
Granitic magmas may be considered as one of the possible sources of mineralization because the vast majority of rare-element deposits of various genetic types are spatially related to granitoids, but despite the benefits of enrichment of rare metal mineralization in rocks or formations It is not clear that all of the granitoids are associated with the formation of ore deposits or ore deposits.This appears to be related to the production of granitoids and their subsequent crystallization.These conditions determine the enrichment of rare elements dispersed in them after magmatic formation .If the data used to judge the regional characteristics or age characteristics that influence the ore-bearing properties of granites are not enough, then a large number of geological and petrographic investigations lead to the view that In terms of ore-bearing significance, the most promising ones are often the late-intrusive pale-grained granites and the granodiorite complex, which is not large in scale, and these rocks are all hosted in regional faults With, generally